Eheet



H. E. STONE.

FILTERING APPARATUS. APPLICATION FILED 1AN.18. 1919.

1 ,3 1 6,465 Y Patented Sept. 16, 1919.

H Y" V" r* h a n l 26':

miran Parleur oprrcnfj HARRY, EDMUND STONE, or Non-RISTOWN., PENNsYLvnNIA, A ssreivonfrqnnnnr 'Maman Mmeaewmaeeaaeaaa ereeaaereeaeaf eeaeeaaeaa oaeeaaeeeeaaea;

FILTnnING APPARATUS.

.'/c all/whom t may concern;

Be it known that I, liliana; Enivruivn STONE,v a citizen of the United States, regiding at Norristown, inA the-county 'of Apntgomery and vState of Permsylvaina,- have inprovide filtering apparatus so'd'esigned. that the filtrate may have unobstructedpassage through 'outlet channels in the filter-beards. A further object ofthevpresent invention is to so arrange the outlet channels of.A the y lter-boards that the samemay bereadily and expeditiously cleansed o fany solids` as may be collected therein Without dismantling of the filter boards. A further objectof Athe present invention is t0 so arrangezthe Outlet channels of the filterfboards that 'a ready nspection of the outlet channels may be effected Without resorting to dismantling of the filter-boards. A further object ofthe present invention relates to tl'lfe providing of filtering apparatus characterlzdfliy asimp'lied construction for increasingthe efficiency of A filtering apparatus "of the Chill.'- acter statedfwhereby the, cost of.4 11pkeep and maintenance is materially reduced over like apparatusnovv upon `the ijnajrlret.` still further object of the present invention relates to the providing ofltering apparatus in Whicha filter-board is made up ofsplalced slats having .a filter-clothutherefaround, both Vthe filterboar'd andfiltcr-cloth being' apertured in alinement longitudinally considered and the ltercloth secured. to the filter-board adjacent its aperture'df portion. QtherI ani. further objectswvillhereinafter,appear.

The invention consists. off thefimprcvements hereinafter. described 'and' fnllly claimed.`

The nature, characteristic features and scope ofV the invention -Will be more fully understood from the following description taken in connection with the accompanying drawings forming part hereof.,- and fnwhich:

yfeatteea.ettlle..irneatea aapl- F et. 21S.,- a traaSverSeSep leaal Vleugel? Seeaaeetieeefettefetateat Patenteplfsgentlt, 19.19-

ltgpre 1. iS. a .vien lla.. Slple. eleratea partly seotleneel 0f llteriag apparataSY embed lpg apparaitre with.. fltelkeletly 'remeved 11.1. Order. t0." illustrate Of-a filter-.baarde Y Eeetlle palppeeoi-illaetratiag.apriliavention,V I have shown inthe A4accorgpany'1n-,ng daarmee. elle ferm. .thereoffwlnele 1S. at preeent preterrgefsl bv me, ea'ee t.l.1 e .Sa 1ae llaa beep taaad 11.1...praet1eete give eatietaetply and reliable resalta. although it.. ie te be .enderwhich. my invention .eeLaSSte @aat-e Yaiepely arraageelaad organized apCl-tliatay'laveatien. iS netv lialalteel.Y t0. the preesefarraisement ties as ,herein lshovvrn la the drawing theflltelffpreee le deelgaated 10,` the .feed eeaaeetea 11, f the] liltate pipes 12, they discharge troghr'lfand the And,o1 'ganiization Vof `the in strunientali-Y *A llltiate taak ll! 'Theglter-pleee lS.1aaelea`1pj of a plurality of :filterboards separatedby means i of rectangular,` spacer-frames 1 5',V end platee .16 and; 17 beleg utilized alle the whole clamped together as "by horizontally depeeesl., longitudinally. eateadeplileelte 1.8. The spaces'betvveenadjacentfilter-boards as farmed by. the .reetaegalap 4Spa.Celi-fea.allee. le constitute cells 19, VEach iltelr-bp;trdfv comprlses a c rectangular frame removably tted within which are a. pllilaltv.. et 'veftleallv flepeeetl, Spaped Slate 20L, laefeppelfan'fl loner bare 2.1;ef-:theteamearelleifiaantally groovedyas at 22 to receive the tongues 23 el the Slats '21oY aad laterally llepee'eplleelte Y Qepaee threagllthe .aprlgllte 25 eftlie flame.

andtheslatsjte provide strengthfand rigdity, and.` t0 Support w-.aellere 245 which l spaethe slats 20. Thefrarne yparts are Ade- 'taehably Seeareelteeethelaeby bolts. 2.6.. Ia praetee Several Slate yfleelgllated 201rat the eeatenelt a. ilterv'bealdf are integrally termed frornfa relatively broad. Section 2 7; centrally aperturedas alt28. Bgy thisconstruction the Spaces. 2.9;l .etWeen;elatSr20Cle net e'Xt'eafl from tap tehettelp 0f ether-.beard de the .Spaeee 29. The .apertaee 'Qfltlae ltelL1` baarde are in alnemeat. with the feeelf @on-f necton. 1 1,4 Extending laterallythrcugh each of the slats QOQO is anopening 30 and-.Similarlr i eateaelaettlareagli .eee .e the side bars of the frame of a lter-board is an opening 30. These openings are in alinement and form ank outlet channel for the escape of filtrate material. The channel is preferably formed at a slight distance above p the top of the lower rail 21 of a filter-board nuts 33V. By this means a lter-clothis securely' fastened around the aperture of a lter-board and a permanent opening established through a ltenboard so that an unobstructed means of communication is provided from cell to cell throughout' the length of the lter-press.

A description will now be given of the method of operating filter apparatus as above described and while the same is applicable to the filtration of various materials it is particularly adapted for the separating of magnesium bicarbonate solution from calcium carbonate in suspension and for illustrative purposes the following description will be restricted thereto. Raw material (magnesium bicarbonate solutionl and calcium carbonate in suspension) is fed under pressure through connection 11 to the filterpress which raw material passes through the apertured filter-boards and fills the press in a few minutes time. Raw material is fed under pressure for a period of about six hours. During this time there collects or accumulates in the cells 19 the c-ake, which in the present instance is calcium carbonate solids and the filtrate, which is 1nagnesium bicarbonate, passes through the filtercloth into the spaces between the slats of the Vfilter-board and thus finds its way to the Yplurality of spaced filter-boards each iilteroutlet channel. From this channel the filtrate escapes by way of the filtrate pipes and trough 13 to the filtrate tank. Thecake is removed by dismantlingthe press asis well understood in the art. During the period of feeding raw material to the press an aperture in a filter-board may become clogged and lateral pressure developed upon the feed side of a filter-board. However by making a iilteiboard of slats as described,

but slight pressure develops before a ilter- A cloth is punctured thus restablishing communication from cell to cell thereby equalizing pressure. If the filter-boards were solid instead of being slitted, pressure developed upon the feed side of a filter-board would have the tendency to cause the collapse and breakage thereof. By having the filter-board slitted the resultant damage is but a hole in a filter-cloth.

From the foregoing description it is apable implement ina few moments time.

This may be accomplished without dismantling a filter-board, thus saving not only con- Vsiderable time and labor, but insuring the constant use of a iilter-board. An inspection of said channel may also be readily made as the same is easy of access.

It will 'now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable in the statement of the invention and the above description and while I have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that the same is susceptible of modification in various particulars without departing from the spirit or scope of the invention or sacrificing any of its advantages.

What I claim is:

1. In a filter-press the combination of a plurality of spaced filter-boards each:` filterboard comprising a rectangular frame provided with vertically disposed, spaced slats,

each of said slats and one of the vertical bars of said frame being apertured 1n alinement to form an unobstructed outlet channel and one of said slats being provided with an inlet opening disposed at right angles to said outlet channel.

Q. In a filter-press the combination of a `to form an unobstructed outlet channel which channel is located in a plane above the floor of saidpress and one of said slats being provided with an inlet opening disposed at right angles to said outlet channel.

A filter-board comprising a rectangular frame provided with vertically disposed, spaced slats, each of said slats and one 0f the vertical bars of said frame being apertured in alinemcnt to form an unobstructed outlet channel and one of said slats being provided with an inlet opening disposed at right angles to said outlet channel.

ll. A filter-board comprising a rectangular frame provided with vertically disposed, spaced slats, each of said slats and one of the vertical bars of said frame being apertured in alinement to form an unobstructed outlet channel which channel is located in a plane above the top of the lower bar of said frame, and one of said slats being provided with an inlet opening disposed at right angles to said outlet channel.

5. In a filter-press the combination of a plurality of' filter-boards having a cell between adjacent filter-boards each filterboard comprising a rectangular frame provided with vertically disposed, spaced, slats of which the central sla-t isV wider than the other slats and is centrally apertured, said slats and one of the vertical bars of said frame being apertured in alinement to form an inlet channel, filter-cloths for said filterboards each 'filter-cloth being apertured in alinement with a filter-board aperture, means for securing a filter-cloth to a filterboard, and an inlet connection for feeding raw material under pressure to said press, said inlet connection being disposed in alinement with the alined apertures of said filterboards whereby the raw material may have free passage through said alined apertures but upon clogging of a filter-board aperture l lateral pressure as developed upon the feed side of a filter-board may puncture a filtercloth to reestablish communication between adjacent cells by reason of the slitted construction of a filter-board.

and is provided with a substantially central V' opening the remaining slats and an upright t of each frame being apertured adjacent the press bottom said central openings being alined to form an inlet channel, and said apertures of each frame being Llined to form an outlet channel.V

8. A filter-board comprising a frame provided with slats one of which is apertured at right angles to the plane of the frame and each of which and a frame upright are apertured adjacent a board bottom, the latter apertures being alined, bolts passing through said slats and frameuprights and washers for said bolts for spacing said slats.

'9. A filter-board comprising a frame provided with slats of which oneof said. slats is wider than the remaining slats and is provided with an inlet opening at right angles to the plane of the frame and all of said slats and a frame upright being apertured adjacent the frame bottom the latter apertures being alined to pro-vide an outlet channel. l

l0. In a filter-press a plurality of filterboards spaced to provide cells therebetween each filter board comprising a frame provided with slats, one slat of earch frame being provided with an inlet opening and all the slats and an upright of each frame being apertured in alinement adjacent the press bottom to form an outlet channel at Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, I). C. 

